stm32f103c8t6按键控制舵机

以下是通过按键控制舵机的STM32F103C8T6代码示例，假设使用PA0号口连接按键，PB0号口连接舵机信号引脚：

#include "stm32f10x.h"

#define SERVO_PIN GPIO_Pin_0
#define SERVO_PORT GPIOB

#define BUTTON_PIN GPIO_Pin_0
#define BUTTON_PORT GPIOA

void GPIO_Configuration(void);
void TIM_Configuration(void);

int main(void)
{
  GPIO_Configuration();
  TIM_Configuration();
  
  while(1)
  {
    if(GPIO_ReadInputDataBit(BUTTON_PORT, BUTTON_PIN) == 0) //按键按下
      TIM_SetCompare1(TIM3, 50); //舵机转动到0度
    else //按键松开
      TIM_SetCompare1(TIM3, 250); //舵机转动到180度
  }
}

void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
  
  //配置PB0引脚为推挽输出，控制舵机转动
  GPIO_InitStructure.GPIO_Pin = SERVO_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(SERVO_PORT, &GPIO_InitStructure);
  
  //配置PA0引脚为输入，接入按键
  GPIO_InitStructure.GPIO_Pin = BUTTON_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
  GPIO_Init(BUTTON_PORT, &GPIO_InitStructure);
}

void TIM_Configuration(void)
{
  TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;
  TIM_OCInitTypeDef TIM_OCInitStruct;
  
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
  
  TIM_TimeBaseInitStruct.TIM_Prescaler = 71; //定时器分频值
  TIM_TimeBaseInitStruct.TIM_Period = 19999; //计数器计数上限
  TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1;
  TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;
  TIM_TimeBaseInit(TIM3, &TIM_TimeBaseInitStruct);
  
  TIM_OCInitStruct.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStruct.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStruct.TIM_Pulse = 250; //初始占空比，舵机转动到180度
  TIM_OCInitStruct.TIM_OCPolarity = TIM_OCPolarity_High;
  TIM_OC1Init(TIM3, &TIM_OCInitStruct);
  
  TIM_Cmd(TIM3, ENABLE);
}

注：以上代码未包含头文件等内容，需要根据实际情况自行添加。